S890Q is an ultra-high-strength quenched and tempered structural steel with a minimum yield strength of 890 MPa. It offers good toughness, weldability, and fatigue resistance, making it suitable for heavy-load and high-stress applications.
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S890QChemical Composition |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
N |
B |
Cr |
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S890 Q |
0.20 |
0.80 |
1.70 |
0.020-0.025 |
0.010-0.015 |
0.015 |
0.005 |
1.50 |
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Cu |
Mo |
Nb |
Ni |
Ti |
V |
Zr |
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0.50 |
0.70 |
0.06 |
2.0 |
0.05 |
0.12 |
0.15 |
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Grade |
S890Q Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
Min Impact Energy
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S890 Q |
mm |
Min Mpa |
Mpa |
Min % |
-20 |
30J |
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3<t≦50 |
890 |
940-1100 |
11 |
-20 |
30J |
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50<t≦100 |
830 |
880-1100 |
11 |
-20 |
30J |
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100<t≦150 |
800 |
820-1000 |
11 |
-20 |
30J |
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Key Applications
Lifting & Loading Equipment:
S890Q is widely used in mobile cranes, loader cranes, aerial platforms, hoists, and various load-handling gear. Its ultra-high strength allows manufacturers to reduce the weight of booms, jibs, and chassis components while maintaining high load capacity and structural stability, even under dynamic and repetitive lifting conditions.
Transportation:
In transportation, S890Q is applied in articulated dump trucks, heavy-duty trailers, and specialized containers. By using this high-strength steel, vehicle bodies can be made lighter without compromising durability, which in turn increases payload capacity and improves fuel efficiency, as noted by Brown McFarlane and other industry sources.
Construction:
Within the construction sector, S890Q is used in high-rise buildings, bridges, scaffolding, and communication or wind towers. Its combination of strength and toughness helps reduce structural weight, enhance seismic performance, and allow more efficient designs, particularly in large-span and high-stress structures.
Mining & Agriculture:
S890Q is also found in earthmoving equipment, buckets, and heavy agricultural machinery. These applications demand excellent wear resistance and the ability to withstand heavy impact and abrasive conditions, making S890Q a preferred choice according to multiple industry references.
Oil & Gas:
In the oil and gas industry, S890Q is used for offshore fabrications, pressure vessels, and other critical components that operate in harsh and corrosive environments. Its high strength and good fatigue resistance help ensure the reliability and safety of these demanding structures.
Key Advantages:
High Strength & Weight Savings:
With a minimum yield strength of 890 MPa, it allows for thinner, lighter structures that can carry more load, reducing material costs and fuel consumption in transport.
Excellent Toughness:
Its quenched and tempered (QL) process provides high impact resistance and fracture toughness, even at low temperatures, crucial for harsh environments.
Great Weldability:
Despite its strength, it maintains good weldability, allowing for intricate designs and complex component fabrication.
Enhanced Durability:
Offers a longer service life in demanding conditions, resisting abrasion and mechanical stress in applications like earth-moving and drilling.
Versatility:
Used across industries like construction, transportation, lifting, and mining for demanding load-bearing structures.
Get an valued quotation for S890Q, Contact GNEE Steel.
What is the minimum yield strength of S890Q?
The minimum yield strength of S890Q is 890 MPa, which classifies it as an ultra-high-strength structural steel.
What heat treatment process is applied to S890Q?
S890Q is produced using a quenching and tempering process, which imparts high strength while maintaining good toughness and ductility.
What is the typical tensile strength range of S890Q?
S890Q typically has a tensile strength between 960 and 1100 MPa, depending on thickness and manufacturing conditions.
What is the toughness level of S890Q?
S890Q offers good toughness, even at relatively low temperatures, which is important for withstanding dynamic and impact loads.
What is the weldability of S890Q?
S890Q has good weldability, but requires appropriate preheating and controlled interpass temperatures to prevent cold cracking.
What are the typical thickness ranges for S890Q plates?
S890Q is commonly available in thicknesses from approximately 6 mm to 100 mm, with larger thicknesses available on request.
What surface conditions are available for S890Q?S890Q plates are usually supplied with a mill scale surface, but can also be shot-blasted and primed for corrosion protection.
What are the main advantages of using S890Q over lower-strength steels?
Using S890Q allows for significant weight reduction, higher load capacity, and improved structural efficiency in heavy-duty applications.
What are the limitations of S890Q?
Limitations include higher material cost, more stringent welding procedures, and increased susceptibility to hydrogen-induced cracking if not properly preheated and controlled.